CD3E and cancer: On the basis of reference marker genes (epithelial/cancer cell: EPCAM; immune cell: PTPRC, CD3G, CD3E, CD79A; stromal cell: BGN, PECAM1), the 22 clusters were broadly categorized into three major cell types: epithelial/cancer cells (clusters 2, 3, 6, 10, 12, 18), immune cells (clusters 0, 1, 4, 5, 7, 8, 9, 15, 16, 17, 19, 20), and stromal cells (clusters 11, 13, 14, 21) (Figure 11B).